• New episodes of “Community” and “1600 Penn” air at 8 and 9:30 p.m. on NBC. Sandwiched in between, at 8:30 and 9 p.m. are repeat episodes of “Parks and Recreation” and “The Office.” Are you thoroughly confused? Just tune to WKYC-TV Channel 3 or WTOV-TV Channel 9, settle back and enjoy.

• On tonight’s new episode of “Community,” the study group starts its European history class with professor Noel Cornwallis (Malcolm McDowell). Also, Dean Pelton is upset when Chang returns to campus.

• Up next on NBC is an episode of “Parks and Recreation” titled “Halloween Surprise,” which was first shown Oct. 25, 2012. In this episode Ben gets a job offer, forcing Leslie to think about their future. Also, Ron and Andy take Diane’s girls trick-or-treating and Tom looks for a new business idea.

• “Lice” is the title of the repeat episode of “The Office” which follows at 9 p.m. on WKYC-TV Channel 3 and WTOV-TV Channel 9. In this episode, first shown Jan. 10, Pam accidentally brings lice into the office but lets Meredith take the blame. Also, Jim spends a great day in Philadelphia with a potential business associate and Nellie, Phyllis and Kevin interfere with Darryl’s love life.

• NBC’s Thursday night comedy block is rounded out at 9:30 by a new “1600 Penn.” Tonight, President Gilchrist decides to clear his head by taking a family trip to their ranch. Meanwhile, Skip mourns his failed relationship and Emily tries to spend quality time with Xander and Marigold.

• “Earth Day” is the focus of a repeat episode of “American Experience” which airs at 9 p.m. on PBS station WOUC-TV Channel 44 (cable Channel 12). The show traces the origins of the modern environmental movement as told by nine Americans who were inspired to champion the cause.

• In case you missed Monday’s episode of “Antiques Roadshow,” tune to PBS stations WEAO/WNEO-TV Channels 45/49 (cable Channel 14) at 10 p.m. Among the items featured in this episode is a letter dating to 1860 signed by Abraham Lincoln, crystals from Marilyn Monroe and a South Carolina sword dating to the 1850s.

• Fans of the History Channel’s “Swamp People” will want to tune to cable Channel 23 at 9 p.m. for tonight’s new episode. Tonight, a fish kill of Biblical proportions causes the gators to stop biting lines and forces the swampers to get inventive in their hunting strategies.

• Two classics from the 1960s air tonight on Turner Classic Movies (cable Channel 50). First on the bill, at 8 p.m., is “The Graduate” from 1967. Dustin Hoffman, Anne Bancroft and Katharine Ross all earned Academy Award nominations for their performances in this film about an aimless college man (Hoffman) who allows himself to be seduced by an older woman (Bancroft) and then finds himself falling for her daughter (Ross). Mike Nichols won the Oscar as best director, but “The Graduate” lost the best movie title to “In the Heat of the Night.”

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• “The Producers,” released in 1968, follows at 10 p.m. on TCM. The film, directed by Mel Brooks, focuses on a Broadway producer and his accountant who back what they consider to be a sure-fire flop, “Springtime for Hitler,” in order to make money. Featured in the cast are Zero Mostel, Gene Wilde and Dick Shawn.